The following tropes can be applied to the characters of the {{Main/manga}} and {{Main/anime}} series ''Manga/{{Gravitation}}''.

'''Shuichi Shindou'''
->'''Voiced by:''' Creator/TomokazuSeki (Japanese), Rich [=McNanna=] (English)

-->'''Yuki:''' ''Quiet! I haven't cried in six years and my head is really killing me.''
-->'''Shuichi:''' ''Six years? You're just too cool! As for me, I cry at least once a day. Man, that's just mega-cool! It's like you have a dark past or something! Oh, right. You really do. Hahahaha!''

* {{Adorkable}}
* CampGay: To a slight degree.
* DudeLooksLikeALady
* EvenTheGuysWantHim
* {{Flanderization}}: His {{Keet}} tendancies become more prevalent as the series goes on.
* {{Gayngst}}: When it seems Yuki is rejecting him (at several points), his default question is "Is it because I'm a guy?"
* IWantMyBelovedToBeHappy
* {{Keet}}: He's the page image for a reason.
* LoveMartyr
* MoodWhiplash
* OlderThanTheyLook
* PuppyDogEyes
* SailorFuku: Wears this in one episode.
* {{Stripperiffic}}: His performance outfit consists of black leather short-shorts, a black crop-top and an orange overcoat.
** BareYourMidriff: The crop-top leaves little to the imagination.
* StupidSexyFlanders
* SuperDeformed: He falls into this at several points, sometimes with LittleBitBeastly mixed in.
* ThereWasADoor: You can't help but wonder how he's not in debt after all the walls he's had to pay for.
* {{Uke}}
* {{Wimpification}}: Canon example
* WholesomeCrossdresser
* WhoWearsShortShorts: Shuichi wears short shorts.
* {{Yandere}}

'''Eiri Yuki'''
->'''Voiced by:''' Creator/KazuhikoInoue (Japanese), Rome Elliot (English)

--> ''(to Shuichi) "Because I'm a good guy, I have one more piece of advice. If you don't want to kill yourself, you should probably stay away from Mercedes, SLE's, and SAAB Cabriolets. Because if you get infront of me again, I'll hit you and then back up over you for good measure."''

* ArrangedMarriage: [[spoiler:Although he and Ayaka never actually get married.]]
* BastardBoyfriend: Milder example.
* BiTheWay
* DarkAndTroubledPast
* DeadpanSnarker
* DontYouDarePityMe
* DoubleStandard
* HaveIMentionedIAmHeterosexualToday: At least in the beginning.
* [[spoiler:InterruptedSuicide]]
* ManipulativeBastard
* PerpetualFrowner
* PetTheDog
* [[spoiler:RapeAsBackstory]]
* {{Seme}}
* SmokingIsCool
* SugarAndIcePersonality
* TallDarkAndSnarky
* TheStoic
** StoicWoobie

'''Tohma Seguchi'''
->'''Voiced by:''' Creator/AiOrikasa (Japanese), Bill Rogers (English)
* AffablyEvil: When at his worst. Granted, "evil" isn't really the right word for it, but then again, neither is [[{{Yandere}} "sane"]].
* AlwaysCamp
* BerserkButton: If you think dressing up as the [[spoiler: man who attempted to rape Eiri in order to "heal him psychologically"]] is a good idea, you've got another thing coming. He goes from {{Stepford Smiler}} to an {{Ax Crazy}} {{Yandere}} in just a few short panels. Afterward? He's smiling again and brushing his rampage off like it was nothing.
* ClosetKey
* ItsAllMyFault: Two words: New York.
* ManipulativeBastard
* MyGodWhatHaveIDone [[spoiler: When a ''pregnant'' Mika gets sick due to stress and has to be hospitalized.]]
** To really put it into perspective [[spoiler: Tohma was so wrapped up in his business with Yuki that he ''neglected his pregnant wife'', who just happens to be Yuki's older sister. The stress of worrying about Yuki, and the lengths that Tohma would go to in order to do what he perceived to be in Yuki's best interests--including ''threatening Shuichi's life''--put Mika in the hospital. At least Tohma toned it down a bit when he realized he could lose his wife and child if he kept up his antics.]]
* OlderThanTheyLook
* StepfordSmiler: And when he isn't smiling? [[{{Yandere}} Be afraid]].
* TheAtoner: Only in regards to Eiri. Otherwise, he doesn't give a crap, generally.
* WholesomeCrossdresser: At least in the manga sequel.
* {{Yandere}}

'''Hiroshi Nakano aka Hiro'''
->'''Voiced by:''' YasunoriMatsumoto (Japanese), Daniel Kevin Harrison (English)

* HaveIMentionedIAmHeterosexualToday
* IWantMyBelovedToBeHappy
* PairTheSpares: [[spoiler:With Ayaka.]]
* SmokingIsCool
* UnluckyChildhoodFriend: To Shuichi.

'''Suguru Fujisaki'''
->'''Voiced by:''' Creator/FujikoTakimoto (Japanese), Luke Novak (English)

* OnlySaneMan
* TheSmartGuy
* TeenGenius

'''Ryuichi Sakuma'''
->'''Voiced by:''' Creator/KappeiYamaguchi (Japanese), Kenneth Robert Marlo (English)

* BunnyEarsLawyer: In the manga.
* GeniusDitz: In the anime.
* {{Keet}}
* ObfuscatingStupidity: Though his default mode is {{Keet}}, when he gets into performance mode he's an entirely different person. He's also very different when he gets serious.
* OlderThanTheyLook
* VerbalTic: Na no da!

'''Yuki Kitazawa'''
->'''Voiced by:''' Toshikatsu Izaki (Japanese)

* HotForStudent
* PosthumousCharacter
* {{Shotacon}}
* TheAlcoholic

'''Yoshiki Kitazawa'''
* EveryoneHasStandards: Yoshiki can't bring himself to hate Yuki [[spoiler: for murdering his older brother]] because he recognizes his brother's actions were totally wrong in that situation.
* {{Transsexual}}
* {{Transvestite}}

'''Noriko Ukai'''
->'''Voiced by:''' Creator/HarunaIkezawa (Japanese), Creator/MeganHollingshead (English)

* CoolBigSis: To Shuichi, sometimes
* GirlishPigtails
* [[spoiler: HappilyMarried: To Tetsuya Ukai.]]
* [[spoiler: MayDecemberRomance: With Tetsuya Ukai, a much older university professor.]]
* OlderThanTheyLook
* PowerTrio: With Ryuuichi and Tohma, when they were in ''Nittle Grasper''

'''Ayaka Usami'''
->'''Voiced by:''' Creator/RieTanaka (Japanese), Creator/RachaelLillis (English)

* ArrangedMarriage: To Yuki. [[spoiler: She calls it off later.]]
* [[spoiler: IWantMyBelovedToBeHappy]]
* [[spoiler: PairTheSpares: With Hiro.]]
* {{Ojou}}

'''Tatsuha Uesuki'''
->'''Voiced by:''' Creator/HideoIshikawa (Japanese), Creator/JasonGriffith (English)

* DepravedBisexual: Played for laughs.
* StalkerWithACrush: To Ryuuichi

'''Mika Seguchi'''
->'''Voiced by:''' Creator/HiromiTsuru (Japanese), Angora Deb (English)

* [[KnightTemplarBigBrother Knight Templar Big Sister]]

'''Claude Winchester aka K'''
->'''Voiced by:''' Creator/RyotaroOkiayu (Japanese), Brian Maillard (English)

* AxCrazy: PlayedForLaughs
* EagleLand

'''Reiji aka Rage'''
->'''Voiced by:''' Creator/MikiNagasawa

* BerserkButton: Don't say she's just a chick!
* FagHag: She has feelings for Shuichi, but also gets [[GuyOnGuyIsHot turned on by guy-on-guy]]...
* {{Meganekko}}
* {{Tsundere}}

'''Taki Aizawa'''
->'''Voiced by:''' Creator/ShinichiroMiki (Japanese), Tim Breese (English)

* DrivenByEnvy
* JerkAss
* SmugSnake: ''His official character profile'' describes him with such terms as "arrogant" and "has a tendency to smirk".